Heating and ventixtating  apfabattts



A. R. TEARE HEATING. AND VENTILATING APPARATUS Sept 27.1 921.

Original Filed ba n. 27 1 926- new Sept. 27, 1927. a Re. 15,751 STATES PATENT OFFICE."

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HEATING Ami vau'rrna'rme arrana'rus.

Original in. 1 ,697,872, dated November 16, 1926, Serial m. 84,081, filed January;

reissue and au ust 1921. Serial no. 211,240.

lazet n ncaao m- This invention relates to heating andven- I tilating apparatus and is especially concerned :mounte'd upon the shaft 27 and is.operatively .66

with a fananddamper unit which may employed-in connection with the operation" of a hot air heating system.

One of the objects of the present invention 'is to provide a fan and damper unit which is ing-furnaoe and which is so designedtha't. 10 the damper is positively. actuated whenever the, fan is either set in motion orstopped.

To this end I employ an electrically Operated j fan with a mechanical connection between the switch and the damper so as'to shut the 5 damper when the fan is started and to open thedamper when the fan is stopped. In this way, the inlet passageway is, sufficiently opened to permit the normal operation of the system on the gravity basis. Moreover,

whenever. the fan is set in operation, the damper is positively closed so that all of the .air entering the system, must flow only.

through the fan opening.

Thepreferred means for carrying out my invention-is illustrated in the accompanying drawings wherein Fig. -1 is 'a'side elevation of a hot air heating furnace: having my invention associated therewith; Fig. 2 is a section taken on a plane indicated by the line 2- 2 in Fig. 1: while Fig; 3 is a section taken 2: Figs. 4 and 5 are sections showing details of construction of the control mechanism.

49 the inlet passageway I have shown a frame- 15. which has a fan opening'16 and adamper opening 17 arranged side by side. A fan 18 with an actuating motor'19 is shown adja cent the fan opening, while a damper 2O which ispivotally mounted'at21 is shown adjacent the damper opening. 1 r The circuit to the motor is controlled bya switch which is mounted within a switch box a 25. Any suitable knife switch may be suiticient 'for this purpose, but the construction.

- illustrated embodies an operating arm 26- -which is disposed outside the box and ismounted. upon a pivot 27. Within the box 25, I have shown a sheave=28 which is also closing of the damper whenever the fan is for controllingthe operation of said motor,

connected as by cords or chains'30 to an arm 31 whichis mounted on the shaft 21 outside i the conduit 11. In this way the damper may be from open to closed position when ever the arm 26 is moved to open the circuit to the niotor 19. In Fig} 1, the damper isdisposed adjacent the inlet to a hot air heatthe closed position is indicated by broken shown in open position in full. lines, while lines 31Q1A corresponding position oftheactuating arms is indicated at'26.

An advantage of an apparatus embodying my invention is that the controlbox may be placed in a room above the furnace room and that" the operator is assured of a positive started. Moreover my invention may be readily installed in 'exi'stingfurnaces without necessitating changes in the construction thereof.

I claim:

1; In combination, a heating chamber of a hotair furnace having an air inlet, a fan and damper disposed across the inlet, an electric motor for actuating the fan. a switch and a mechanical connection between the switch and damper, whereby the damper is opened when the switch is opened and is closed when the switch is closed. a on a plane indicated by the line 3+3 in Fig;

2.-- In combination with the heatingcham- 8 .be'r of a hot. air furnace having an air inlet a passageway, a fan anda'damper iassoclated I have illustrated my invention in con-.

with the frame. an electric motor for operatingthefan' and a switchfor controlling .th e circuit to said motor, there being a positive mechanical connection between the switch and damper, whereby operation of the switc efi'ects operationof the damper.

3. In combination with the heating chamber of-a hot air furnacehaving an'inlet passageway, of a frame disposed across the passageway' and having a fan "opening and a damperopening. a damper pivotally mounted across the damper opening, a fan disposed adjacent the fan opening, an electric motor associated with the fan, a switch in circuit, with said motor, operating'means for said switch'and a'mechanieal connection between'said means and said damper whereby the damper is actuated whenever the switch actuated. y 1 4. In combination with the heating chain'- ber of a hot air furnace having an inlet pas- I sageway, of a furnace having an inlet passheave with said dalnper whereby operation of the sheave efl'ects operation of the damper, said sheave being actuated whenever the switch is actuated so as to. close the damper whenever the fan is set in operation, and to open the damper whenever the I fan is stopped.

In testimony whereof, I hereunto afiix my signature.

ALBERT R. TEARE. 

